Q$1(4$ marks$)$ Circle the most correct answer for the following statements:

The following is true with respect to hydrographs:

a$)$ catchment characteristics control the falling timb because they tend to change after ralnfall.

b$)$ rainfall intensity increases with time and controls the rising limb

c$)$ for a specific storm, one hydrograph represents fow at all points in the catchment.

d$)$ the time to peak is usually shorter in gently sloped areas.

e$)$ All the above

f None of the above