Can someone give me these answers please?

Plz genetic engineering can be applied to many fields including medicine and agriculture. which of the following is a medical application of genetic engineering? a. giving crop plants recombinant dna so that they would be resistant to herbicides. b. examining a persons pedigree to determine whether they can carry a gene for a genetic disease. c. analyzing a persons dna to see how closely they are related to another person. d. certain genes into bacteria so that they will produce a needed medicine.

Aperson with age is more likely to catch diseases that healthy people usually don’t catch.what are these infections called?

Cells destroy body cells infected by a virus or bacteria. killer t t memory t none of the above