I think that the answer is D
Parallelism is the use
of the components in a sentence that are the same grammatically or similar in
construction, sound or meaning. It is used as a literary device in may works.
Examples are "James ran into the garden, into the room and into our
hearts.", "Like father, like son.", and "Easy come, easy
go." The correct answer is D. <span>In class we learned about triangles and about the right way to measure their angles.</span>
B.On the hike, Mr. Clark tripped over a tree root, fell to the ground, and broke his wrist.
Parallel structure is using the same grammatical structure for a list of items or ideas. In option B, all of the actions in the list are written in simple past tense. They do not include a helping verb or other form. The verbs are all the same structure: tripped, fell, broke.
Option A is not correct. To make it correct parallel structure, "being responsible" should be "responsibility". To correct the parallel structure for Option C, "babysitting" should be "to babysit". To fix option D, add "having" before fierce determination.
