Family influence has a large impact on individuals suffering from somatoform disorders, especially if there is a with the same diagnosis.

a. female relative
b. male relative
c. parent
d. sibling

The answer is: parent

Somatoform disorder refers to a form of mental disorder that cannot be fully understood by common medical condition.  When somatoform disorder occurs, psychiatrists would most likely look into parents' psychological history and general behavior to find out whether genetics or observation can cause the disorder in the children.

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answer; being clearly political;