Answer:
"Jim's car just can't be safe; I'll bet he doesn't even have insurance."
Explanation:
The sentence that uses an apostrophe correctly is "Jim's car just can't be safe; I'll bet he doesn't even have insurance." In this sentence, the apostrophes are used correctly in three instances:
"Jim's car" - The apostrophe is used to show possession, indicating that the car belongs to Jim.
"can't" - The apostrophe is used to form a contraction of "cannot."
"I'll" and "doesn't" - The apostrophes are used to form contractions of "I will" and "does not" respectively.
The other sentences contain incorrect uses of apostrophes:
"Jims' car does not conform to the state's regulations on smog emissions." - The apostrophe after "Jims" is incorrect because "Jim" is a singular noun, so the apostrophe should be before the "s" ("Jim's").
"Youv'e never seen a car like Jim's machine; he's got to fix it." - The apostrophe in "Youv'e" is misplaced. The correct contraction of "you have" is "you've."
"He has never been in an accident, but Jim's car still isn't safe" - The apostrophe in "is'nt" is misplaced. The correct contraction of "is not" is "isn't."