The correct option is B how to make English muffins
A noun clause is a dependent clause that functions as a noun. It usually
begins with what, whatever, whom, that and other such relative
pronouns. A noun clause can act as a subject, object, predicate
nominative or object of a preposition, in a sentence.
We can reduce a noun clause to a noun phrase by using an infinitive phrase, where the subject is removed and the verb phrase is changed to an infinitive (to + verb).
Option B is
correct because it is the reduced form of the underlined clause, with the infinitive 'to make'.
Option A is incorrect because it is different in meaning from the underlined clause.
Option C is incorrect because upon adding the phrase the sentence isn't coherent in meaning.
Option D is incorrect because the answer lies in B.