The following steps describe a technique for producing a crop that is resistant to insect pests.

1. Remove gene for pest resistance from a bacterial cell.

2. Place gene for pest resistance into the cell of a crop plant

3. Grow modified plant cells in a culture to produce a mature plant

What agricultural technique do the steps describe?

A. Pesticide application

B. Selective breeding

C. Monoculture cropping

D. Genetic engineering