The smaller horizontal angle between the true meridian and a survey line, is known A. Declination B. Bearing C. Azimuth D. Dip

The correct answer is bearing.

A bearing is a horizontal angle measured clockwise from north, and is used to define the direction of a line. The smaller horizontal angle between the true meridian and a survey line is known as the bearing of the survey line.

Declination is the angular difference between true north and magnetic north.

Azimuth is the angle between the north direction and the direction of a line, measured clockwise from north.

Dip is the angle between the Earth’s magnetic field and the horizontal plane.