Use the weather map to answer the question.

Weather map with blue line with triangles pointing down and to the right. Red line with semi-circles pointing up and to the right. Red line is to the right of the blue line.
© Dorling Kindersley / Universal Images Group / Image Quest 2016

What does the red line indicate?

A. A cold front is moving to the north and east.
B. A cold front is moving to the south and west.
C. A warm front is moving to the north and east.
D. A warm front is moving to the south and west.