Answer:
The answer is:
C
D
A
B
Explanation:
A is wrong on the first question since it doesn't connect two points on the circle. It's the radius which is from the centre to any end of the circle.
you have everything right except that C should be the answer to the first one and A should be the answer to the third one.
so your answers should be like
1.6m questions
2.0m answers