Only one answer is correct.
a)Time; data to impair the accuracy of the position fix (Selective Availability SA)
b)Almanac data; satellite status information
c)Data to correct receiver clock error; almanac data
d)Time; position of the satellites
a) Incorrect, no information on Selective Availability is ever broadcast.
b) Correct.
c) Incorrect. There is no way the satellites know what is wrong with the clocks in every receiver in the world.
d) Incorrect. Time is broadcast, position is not as discussed
as nauseum above.
You just refuse to accept that Oxford has got it wrong!