Answer:
They are to wait for at least one year.
Explanation:
Infertility maybe defined as trying to get pregnant without success despite having frequent sexual intercourse for a period of at least one year.
D. ice core samples for the arctic and anarctic
DNA
Nucleic Acids are the basis for the storage and transmission of hereditary information in all cells. Determines a cell's function and manufactures proteins & enzymes. Encodes instructions for making proteins and RNA. DNA stores the “operating instructions” for a cell.
