Answer:
Part A: C. 4 to 1
Part B: 2
Explanation:
Part A: 
What is the ratio of the number of students receiving a C and the number of students receiving an A? 
As per table given:
- 12 students received a C and 3 students received a A
 
The ratio C/A is:
The correct answer choice is:
Part B: 
Complete the statement: 
For every student receiving a D, ______ students received a B. 
As per table given:
- 4 students received a D and 8 students received a B
 
The ratio D/B is:
The statement is:
- For every student receiving a D, 2 students received a B.