In the context of India's population growth trajectory, consider the following statements:

A. The 1921 census showed the annual population growth rate drop to around 1% compared to over 1.2% earlier.

B. This decline was attributed to the effects of the 1918 influenza pandemic causing millions of deaths.

C. The 1921-1951 period recorded higher population growth compared to later decades.

Which of the statements given above is/are correct?