Choose the sentence which is correct?

Question

Accepted Answer

That so many advances have been made in such shot time is the most valid argument for retaining the research unit

Answer

That so many advances have been made in short time is the most valid argument for retaining the research unit

Answer

That so many advances have been made is so short time is the most valid argument for retaining the research unit

Answer

That so many advances have been made in so short a time is the most valid argument of retaining the research unit