Helpp! Zika fever is a viral disease. The virus is transmitted by Aedes aegypti mosquito bites. Most people have only mild symptoms from Zika. However, Zika can cause pregnant woman to have babies with serious birth defects. A British company is working to reduce mosquito populations through genetic engineering. The company has genetically modified A. aegypti mosquitoes so their offspring die before they mature. Tests in Brazil showed that local A. aegypti populations dropped 80-90% after the genetically modified mosquitoes were released. Which of the following statements is true of all genetically engineered organisms?

A: They are produced by breeding only the individuals with desired traits
B: They contain genes transferred from another organism
C: They are made using half the genomes of two different species
D: They have a genome that is identical to their parents’ genome