In which of the sentences below is the shift in verb tenses acceptable?
pick all that apply.
a. i felt secure knowing that my valuables are in my safe deposit box.
b. the car is in the shop when i went to pick it up.
c. i was thinking about cape town when sathima called.
d. he's playing a song he learned from max roach.
e. by the time the police arrived, the intruder had left.

The correct answers are C) I was thinking about Cape Town when Sathima called. D) He's playing a song he learned from Max Roach. E) By the time the police arrived, the intruder had left.

The shift in verb tenses is acceptable in the following sentences:" I was thinking about Cape Town when Sathima called." "He's playing a song he learned from Max Roach." And "By the time the police arrived, the intruder had left."

We are referring to a grammar subject, tense shift. This means to change a verb tense to another. It could be from past to present in the same sentence or the same paragraph. What the author tries to do when using tense shift is to light up the moment of making it more vivid to improve its narrative.

no its not a run on sentence however i think you meant wet suits not sours also a run on sentence would be like surfers surf all winter long in southern california by using wet sours to keep them warm and the live their all year long  

it is grammatically incorrect and is illegible to me and i can not answer it.