When studying living cells in a laboratory, researchers sometimes use drugs as a way to cause cells to remain in a particular phase of the cell cycle. For example, aphidicolin inhibits DNA synthesis in eukaryotic cells and causes them to remain in the G1 phase because they cannot replicate their DNA. In what phase of the cell cycle-G1, S, G2, prophase, metaphase, anaphase, or telophase- would you expect somatic cells to stay if the following types of drug were added?
A. A drug that inhibits microtubule formation
B. A drug that allows microtubules to form but prevents them from shortening
C. A drug that inhibits cytokinesis
D. A drug that prevents chromosomal condensation