Consider the following effects of genetic engineering.
1. Disease resistance
2. Growth promotion
3. Animal cloning
4. Human cloning
Of the above, what have been tried with a certain amount of success include?

A. 1, 3 and 4

B. 2, 3 and 4

C. 1, 2 and 4

D. 1, 2 and 3

Answer: Option D