The balloons in the sky?
a.) rised
b.) raised
c.) have rose
d.) have risen

The best answer to the question above is option D: HAVE RISEN. The complete sentence would be: The balloons have risen in the sky. Option A is incorrect because the past tense for the word "rise" is "rose". Option B is also incorrect because we cannot use the word "raise" here because there is no direct object. Option C is also incorrect because the past participle of the word "rise" is "risen".