Which two observations are most useful for explaining the trends in the data? Select two answer choices.

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the answer is c.) there is a warm front in region a and a stationary front in region b.

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.

answer///multiple alleles;