Stationary fronts occur when warm and cold air meet. This brings cloudy, and wet weather. So your answer would be C.
It gives you a generic understanding of how the sequence of events will go.
The process by which living things produce more organisms like themselves is the reproduction. There are two types of reproduction namely; asexual reproduction where only one parent is involved, and sexual reproduction that needs two parents, such that the cells of the two parents (egg and sperm) join, resulting to a unique offspring since they have characteristics from each parent are passed down/combined.
The place you would find the most mature sepermatozoa in a male reproductive system would be (B). in the ductus deferens and ejaculartory duct
