Identify the correct statements about techniques used in mapping the Terra.

A. Clinographic curve illustrates the average gradient between successive contours and shows up prominently any abrupt change in the general relief depicted on a map.

B. The relation between horizontal and vertical scales is known as horizontal exaggeration.

C. A profile drawn along the stretch of road, or a river, is called longitudinal profile.

D. A cross profile gives a panoramic view with a distant sky-line, a middle ground and a fore- ground.

Choose the correct answer from the options given below.