I don't think that your options match your tiles - you must have copied them wrong. I can only match iambic pentameter with D. each foot consists of one unstressed followed by a stressed syllable.
However, enjambment has nothing to do with the stress in syllables, but rather with the fact that some poets like to continue a sentence in a poem into the next line, without the use of commas or other pauses. Blank verse is a type of a verse that doesn't have a rhyme, and is made up of iambic pentameters.