The plan faced a major obstacle, ______ it could still succeed.

The plan faced a major obstacle, ______ it could still succeed.

• A. Like
• B. Although
• C. There
• D. When

Answer: (B)

Concessive clauses show a contrast between two ideas. Here you want to express that there was a problem, yet success remained possible. Although does this work best because it signals that contrast: despite the major obstacle, the plan could still succeed. The sentence with although reads smoothly and clearly links the two ideas in a natural way: The plan faced a major obstacle, although it could still succeed. Other options don’t fit because they don’t signal this kind of contrast or they don’t grammatically connect the ideas in the same way (like would introduce a comparison, there doesn’t work as a connector here, and when would refer to time, not contrast).

Concessive clauses show a contrast between two ideas. Here you want to express that there was a problem, yet success remained possible. Although does this work best because it signals that contrast: despite the major obstacle, the plan could still succeed. The sentence with although reads smoothly and clearly links the two ideas in a natural way: The plan faced a major obstacle, although it could still succeed. Other options don’t fit because they don’t signal this kind of contrast or they don’t grammatically connect the ideas in the same way (like would introduce a comparison, there doesn’t work as a connector here, and when would refer to time, not contrast).