Help please I couldn't find the right answer

Fossils of tropical plants have been found in the Earth's polar regions. How could this be explained?

A. The continent on which the tropical plants lived changed latitudes over time.

B. The fossils are of arctic species that look like tropical species.

C. Seeds from tropical plants were carried to the polar regions by birds a long time ago.

D. Tropical plants were able to withstand much colder temperatures in the past.​

Cold case files recently began re-investigating an old murder case. the murder took place in the park; a young man, james, was hit over the head with a brick and killed. police suspected the jealous former boyfriend of james' wife, karen. whoever killed james may have washed their hands in a near-by bird bath as detectives found blood in the bird bath. since the murder took place before dna fingerprinting was available, the suspected killer, ronnie, went free. detectives are now reviewing the blood evidence using dna fingerprinting. based on the dna fingerprints of all possible suspects, who is james' killer?