Read the following sentence and identify the problem existing in it. What is the problem？Regular physical exercises can boost our interpersonal relationship.

Read the following sentence and identify the problem existing in it. What is the problem？Regular physical exercises can boost our interpersonal relationship.
A.A lack of necessary transitional words
B.Wrong logic in the sentence
C.Missing links in the causal analysis.
D.Mismatched causes and effects
正确答案：Missing links in the causal analysis.