Which passage is correctly punctuated?

Question

a)In the middle if the night. My cat leaped onto mt stomach.

b)In the middle if the night, my cat leaped onto mt stomach.

c)In the middle if the night; my cat leaped onto mt stomach.

d) My cat leaped onto mt stomach. In the middle if the night.

Answer 1

Which one do you think is correct? I'll be glad to check your answer.

Answer 2

I was thinking B

Answer 3

You're right. It's B.