Question

Identify the correct sentence.

a. the old man opened the window he took a deep breath of the crisp fall air.
b. the old man opened the window and he took a deep breath of the crisp fall air.
c. the old man opened the window; he took a deep breath of the crisp fall air.
d. the old man opened the window, he took a deep breath of the crisp fall air.

Answer 1

c. the old man opened the window; he took a deep breath of the crisp fall air.

Answer 2

b and c are correct. I judge it from my personal experience.