In the following question, two columns are provided, each containing three clauses or sentences. Identify the pairs that can be combined to form grammatically correct and coherent sentences.

COLUMN I	COLUMN II
(a) Although the manager tried to inspire the team with a speech	(d) she will monitor the student seating arrangement closely
(b) Whenever the weather changes suddenly in the mountains	(e) he had completed the report before the deadline
(c) Since the professor values discipline during exams	(f) leads to severe delays in transportation services

The correct answer is Only (c)-(d).

Let's analyze each clause pair to see which ones form grammatically correct and coherent sentences:

1. Analyzing pair (c)-(d):
Clause (c): "Since the professor values discipline during exams" (Dependent/Subordinate clause indicating reason)
Clause (d): "she will monitor the student seating arrangement closely" (Main clause expressing the resulting action)
When combined: "Since the professor values discipline during exams, she will monitor the student seating arrangement closely."
This combination forms a logical, grammatically sound, and complete sentence where the cause is given in clause (c) and the effect/action is stated in clause (d).

2. Checking other combinations:
- (a)-(e): "Although the manager tried to inspire the team with a speech he had completed the report before the deadline" – This lacks logical coherence; trying to inspire a team with a speech does not logically contrast with completing a report before a deadline.
- (b)-(f): "Whenever the weather changes suddenly in the mountains leads to severe delays in transportation services" – "Whenever" introduces a subordinate clause, but combining it directly with "leads to..." results in a missing subject for the main verb "leads", making it grammatically incorrect.
- (a)-(d): "Although the manager tried to inspire the team with a speech she will monitor the student seating arrangement closely" – Unrelated contexts (manager/team vs professor/seating arrangement).

Therefore, only the pair (c)-(d) combines to form a grammatically correct and meaningful sentence.