Correct option is E
(a) The team of researchers were conducting experiments in the laboratory.
Error: The subject "team" is a collective noun and should take a singular verb.
Correction: The team of researchers was conducting experiments in the laboratory.
(b) He bought two much candy at the store.
Error: "Two much" is incorrect. It should be "too much," indicating an excessive amount.
Correction: He bought too much candy at the store.
(c) Every item on the agenda were discussed thoroughly.
Error: The phrase "every item" is singular, so the verb should also be singular.
Correction: Every item on the agenda was discussed thoroughly.
(d) I couldn't find my keys anywhere, so I had to use an alternative pare.
Error: "Pare" is incorrect. It should be "pair," indicating two similar or matching things.
Correction: I couldn't find my keys anywhere, so I had to use an alternative pair.
So, the correct answer is “All are incorrect”.