Mitosis includes key phases of cell division

Steps:

• Recall mitosis as the process of nuclear division in eukaryotic cells, consisting of prophase, metaphase, anaphase, and telophase.
• Identify events 1, 2, and 3 as standard mitotic phases: chromosome condensation (prophase), spindle formation and alignment (metaphase), and chromosome separation (anaphase).
• Confirm these occur within the mitotic cycle, excluding interphase or cytokinesis.
• Verify choice A encompasses all three events as integral to mitosis.

Why A is correct:

• Mitosis definition includes prophase, metaphase, and anaphase as core events for equitable chromosome distribution.

Why the others are wrong:

• B excludes event 3, omitting anaphase chromosome separation essential to mitosis.
• C excludes event 2, ignoring metaphase alignment critical for proper division.
• D includes only event 2, neglecting prophase preparation and anaphase execution.

Not enough information on exact events 1-3, but assuming standard mitotic phases, A fits.

Final answer: A