Which of the following sentences contains an indefinite pronoun? a. the team congratulated one another on a job well done. b. the flowers, which were just planted, need watering. c. her car's battery died because she left the lights on. d. this is mary's necklace.

A. The team congratulated one another on a job well done.

Explanation:

Indefinite pronouns are useful to make reference to people or things withouht specifying their identity. There are two different word endings depending on what we want to talk about. Pronouns which end in -body or -one are implemented for people, whereas pronouns which end in -thing are destinated for things. Pronouns such as other, another and either are also indefinite pronouns. Finally, they are used both in plural and singular form depending on the case.

since it is asking for her reaction to elnora's trouble at school you can rule out any answers with a positive response (b). then you can rule out (d), this is because it does not show the mother's reaction but the daughter's response. that leaves you with two options (a) and (c), by looking at the options you can rule out (c) because it isn't referring back to elnora's issues at school.