The sentence describes initial skepticism ('met with skepticism') followed by validation ('vindicated her conclusions'). The tone traces a journey from doubt to vindication.

'Ambivalent' means having mixed or conflicting feelings. 'Quandary' means confusion. Option B captures both meanings accurately.

The passage describes assuming that correlation (two things occurring together) proves causation (one causes the other). This is the false cause and effect fallacy.

After the verb 'performing', an adverb is needed, not an adjective. 'Well' (adverb) is correct, not 'good' (adjective).

Perspicacious means having acute mental perception and understanding. It refers to intellectual sharpness.

When 'neither...nor' connects plural subjects (teacher, students), plural verb 'were' is used. The nearest subject to the verb is plural.

Imply means to suggest indirectly; infer means to draw a conclusion. The manager 'implies' (suggests), and workers 'infer' (conclude).

Although 'data' is technically plural (plural of datum), in modern English it's treated as singular in most contexts. The sentence is correct.

'Number' is used for countable nouns (students), 'amount' for uncountable nouns (time, money, luggage is uncountable).

Capricious (unpredictably changeable) fits the context of inconsistent behavior. Fastidious and meticulous suggest careful attention. Prudent means wise, none fitting as well as capricious.