4.
Answer b is correct.
Answer a is incorrect. The rainfall did not contribute to depression enough to be considered an important factor.
Answer b is correct. Tank movement was extremely difficult because of the heavy rainfall.
Answer c is incorrect. Colds and pneumonia were indeed a common problem and did decrease the men's
capabilities. However, these were not as great a problem as tank movement.
Answer d is incorrect. Although these soldiers may have encountered a mildew problem, it would not affect their
ability to fight.
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