The answer is D. Metaphor
A metaphor a figure of speech in which a word or phrase is applied to an object or action to which it is not literally applicable. Unlike a simile, it doesn’t use the words like or as to compare to things. So when you look at the sentence it says “The goalkeeper was a rock...” We know that the goalkeeper isn’t actually a rock, but the sentence is comparing the goal keeper to a rock without using the words “like or as”
