V. Choose the correct sentence among A, B, C or D which has the same meaning as the given :
The rain began to fall during my walk in the country.
A.While I walked in the country, it had rained.
B.While it was beginning to rain, I had walked in the country.
C.While I was walking in the country, it began to rain.
D.While it began to rain in the country, I was walking.