Answer:
A
Step-by-step explanation:
Let's try each of the answer choices:
A. Wednesday to Friday
On Wednesday, 6 computers were sold and on Friday, 15 were sold. Then we can write 6 : 15, which simplifies to 2 : 5, which matches what we want. So, A is correct.
B. Monday to Thursday
On Monday, 8 computers were sold and on Thursday, 16 were sold. Then we can write 8 : 16, which simplifies to 1 : 2, which does not match what we want. So, B is incorrect.
C. Tuesday to Friday
On Tuesday, 12 computers were sold and on Friday, 15 were sold. Then we can write 12 : 15, which simplifies to 4 : 5, which also does not match what we want. So, C is incorrect.
D. Thursday to Tuesday
On Thursday, 16 computers were sold and on Tuesday, 12 were sold. Then we can write 16 : 12, which simplifies to 4 : 3, which still does not match what we want. So, D is incorrect.
The answer is thus A.