It is more difficult to obtain good results while measuringhorizontal distance by stepping

ANS:A - up-hill

The stepping method is more convenient and gives better results while measuring horizontal distance dow and the hill.

But here it is difficult to obtain good results up hill.

If stepping uphill, follower will have the difficult job of holding the tape, horizontal and with the end vertically over the previous arrow.

So, downhill stepping is preferred.