Answer-Below are three sentences (I), (II), and (III). One or more of them may contain a grammatical or usa...

Explanation Rule We use for to denote a period or duration of time e.g., three years, two hours. We use since only to show a specific starting point in time e.g., since 2021, since Monday. Application In Sentence II, three years is a duration of time. Therefore, using since is grammatically wrong it must be replaced with for. Corrected Sentence The software firm has been developing this artificial intelligence tool for three years.

Question

Below are three sentences (

I , (I
I , and (II
I . One or more of them may contain a grammatical or usage error. Choose the option that identifies which sentence(s) are error-free. I. Please ensure all security protocols are strictly updated before logging out tonight. II. The software firm has been developing this artificial intelligence tool since three years. III. A comprehensive survey revealed that online shopping has transformed daily consumer habits.