What Caused Earthworm-Eating Planarian to Live in the British Isles

Question

What caused earthworm-eating planarian to live in the British Isles?
A) It was introduced on some animals.
B) It migrated on a ship.
C) It always lived there.
D) It was introduced in soil of plant pots.

Accepted Answer

The earthworm-eating planarian was introduced to the British Isles in the soil of plant pots, a common way for non-native species to accidentally be transported to new environments.