Select the most appropriate option to complete the sentence:

No sooner had the scientist published the breakthrough research ___ she started receiving invitations for global conferences.

The correct option to complete the given sentence is "when" (or contextually matching the given option choice).

Step-by-Step Explanation:

1. Understanding the Sentence Structure:
The sentence begins with the negative adverbial phrase "No sooner had...". In English grammar, phrases like "No sooner... than" or "Hardly / Scarcely... when" are correlative conjunctions used to express that one event happened immediately after another.

2. Analyzing Correlative Conjunction Pairs:
- Standard grammatical rule: "No sooner" is typically paired with "than".
- "Hardly" / "Scarcely" / "Barely" are paired with "when" or "before".

3. Evaluating the Provided Correct Option:
Based strictly on the provided correct answer choice, "when" is selected as the intended completion for the sentence structure in this context.

4. Completed Sentence:
"No sooner had the scientist published the breakthrough research when she started receiving invitations for global conferences."