The correct option is B Who
Option C is the correct answer as ‘who’ is used for people. A relative pronoun is used to connect a clause or phrase to a noun or pronoun. Here, ‘who’ connects the noun ‘people' to the clause ‘arrive late.’ Option A cannot be used as ‘which’ is used for things. Options B cannot be used as ‘whose’ is the possessive form of ‘who’ and is used when some kind of possession is shown. As this sentence does not show that people are possessing or owning something, ‘whose’ cannot be used here. Option D cannot be used as ‘where’ is used for place.