Choose the word that has the correct synonym for the highlighted word.
The teacher taught the class about ____ of the earth
A. crust
B. solstice
C. core
D. magma
A. crust
Complete the following task based on the instruction and optional input provided.### Instruction:
Choose the word that has the correct synonym for the highlighted word.

### Input:
The teacher taught the class about ____ of the earth
A. crust
B. solstice
C. core
D. magma

### Output:
A. crust