The correct answer is D. Had many professional difficulties.
The phrase “struck several bad patches” means to experience a series of setbacks or difficulties. In this case, the speaker is saying that the person they are talking about experienced a number of professional difficulties before they finally achieved success.
Option A, “came across bad soil,” is incorrect because it does not make sense in the context of the sentence. The speaker is not talking about the person’s physical surroundings, but rather
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