There are two situations to be considered here, Flapping to Equality
and Inflow Roll.
Flapping to Equality.
As the aircraft moves forward, start at a blade tip in the 6 o'clock
position(viewed from above) on the disc. As this blade starts to move
around the disc, due to the forward motion of the aircraft, airspeed
starts to increase. This causes more lift so the blade starts to
rise.
As the blade passes the 3 o'clock postion (US type helos), the
airspeed is at the maximum, induced flow is increased(due to blade
rising), angle of attack is at the minimum, and rate of flap up is at
maximum.
As the blade moves towards the 12 o'clock, airspeed is starting to
decrease, along with rate of flapping up, but the blade is still
rising.
At 12 o'clock, the airspeed is normal and the blade is at it's
highest point.
As the blade moves further, the airspeed is now starting to decrease
leading to less lift, so the blade starts to flap down.
At the 9 o'clock, airspeed is at a minimum, rate of flap down is at
maximum, induced flow is decreases and angle of attack is at maximum.
As the blade moves back towards the 6 o'clock, the airspeed is
starting to increase, rate of flapdown is decreasing.
Back at the 6 o'clock, the airspeed is normal and the blade is at
it's lowest point.
During translation from the hover, the above produces flapback and is
countered by moving the cyclic forward.
Inflow Roll.
This time, we start off in the 3 o'clock position. As the blade
moves forward, induced flow is decreasing, so angle of attack is
increasing, so the blade flaps up.
At the 12 o'clock, induced flow is at a minimum, angle of attack is
maximum, as is the rate at which the blade is flapping up.
As the blade moves towards the 9 o'clock, induced flow is starting to
increase, so angle of attack is starting to decrease, but the blade
is still flapping up.
At the 9 o'clock, induced flow is still increasing, angle of attack
is decreasing, the blade is at it's highest point.
As the blade starts to move towards the 6 o'clock, as the induced
flow is still increasing and angle of attack decreasing, the blade
starts to descend.
At the 6 o'clock, induced flow is at a maximum, angle of attack is
at a minimum, and the rate of flap down is at a maximum.
As it starts to move towards the 3 o'clock, induced flow starts to
decrease, angle of attack starts to increase but the blade is still
flapping down.
As the blade gets back to the 3 o'clock, it is now at it's lowest
point.
Inflow roll wants to roll the aircraft to the right, opposed by left
cyclic. As this is being combined with flapback, theaircraft wants
to pitch up and right.
In answer to the question, as increase in lift gives an increase in
drag, all three answers could be right.
Phew, now I need a rest!