Agree with the comment about it being pedantic. Your answer could be a or b, b or c, or c or d, depending on where your line is. The only way it would be e is if the line was the closet to 4. Haven't seen the B727 trim chart, but if it is the one where you draw the lines and then drop it down, they are very much open to variations. The majority of QF trim charts are now the fill in the box type, then you plot it on the chart.