What does PROTRUDING mean?

In these frames, the author emphasize the challenges lqbal faced by showing

How much time has elapsed from the very beginning of "the memior of the conquistador bernal diaz del castillo" to the end? a. castillo's whole life b. a quarter of an hour c. a few weeks d. a decade

Select the abbreviation that tells how the italicized noun clause is used. s-subject, do-direct object, pn-predicate noun, op-object of preposition the first thing to consider was how to find a paying job. s op pn do