Explanation:

Correct option is Error is in part 3: C (emphasis that this is meant)

Corrected version:

"It needs to be emphasized that this is meant..."

Explanation

A) "Introduce student evaluation of courses"
Grammatically correct – it's an imperative sentence suggesting an action.

B) "to be made public. It needs"
Still okay – it implies that the evaluation is to be made public, and something needs to be emphasized.

C) "emphasis that this is meant"
This part contains an error.

The phrase "It needs emphasis that..." is awkward and unidiomatic in English.

The correct phrasing should be:
"It needs to be emphasized that..."

D) "to be an ‘evaluation’ and not some ‘feedback’ to be"
Correct in structure and meaning.

E) "contemplated upon by the lecturer at leisure."
Slightly formal, but grammatically acceptable.