The most effective way to vary the sentence patterns in this passage is B) To invert sentence 3 so that the verb becomes the subject.
As it currently stands, both sentences 2 and 3 begin with a verb, and later get to the subject of the sentence. It makes the passage more difficult to read when two sentences in a row begin this way.
A better (inverted) sentence would read, "The Heinz Factory, which was considered to be a model place to work, was of particular pride to Henry Heinz, the founder of the Pennsylvania-based company.
