Mendel chose pea plants for his experiments because:
Mendel picked pea plants for his experiment. The reasons for the selection of pea plants for the genetic experiments are:
1) Easy to grow in the garden.
2) Pea plants can be self-fertilized (easy to obtain pure breed plants).
3) The generation time of pea plants is less.
4) Pea plants have easily identifiable traits.
Thus, the correct answer is option D.