Sentence Correction (SC) | Re: Since 2005, the iPod line of digital music players controlled the MP3

Here, since implies duration (time). It is necessary to have either past perfect tense or present perfect tense in the main clause.

A. Since 2005, the iPod line of digital music players controlled the MP3 device market

It is in simple past - incorrect

B. Since 2005, the iPod line of digital music players controls the MP3 device market

It is in simple present - incorrect

C. Since 2005, the iPod line of digital music players has controlled the MP3 device market

Present perfect tense - Correct
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