Final answer:
Various factors such as reduced sperm count, normal sperm cells, abnormal sperm cells, and reduced sperm mobility can lead to sterility.
Explanation:
All options are correct. Reduced sperm count, normal sperm cells indicate a potential issue with sperm production or quality, which can lead to sterility. Additionally, normal sperm count with abnormal sperm cells or reduced sperm mobility can also be factors contributing to infertility.
Learn more about Male infertility and factors leading to sterility here:
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