As part of a promotion for a new type of cracker, free samples are offered to shoppers in a local supermarket. The probability that a shopper will buy a packet of crackers after tasting the free sample is 0.45. Different shoppers can be regarded as independent trials. If X is the number among the next 45 shoppers who buy a packet of crackers after tasting a free sample, then X can be approximately modeled with:

A. Normal(20.25, 11.14) distribution.

B. Normal(20.25, 3.3) distribution.

C. Binomial(20, 4.5) distribution.

D. Binomial(45, 0.55) distribution.