Answer:
c. the new dimm is not properly seated.
Step-by-step explanation:
A DIMM is a computer memory and consists of a small board that has memory chips. It is placed in the motherboard and it allows to increase the memory on the computer. When you add a dimm, you have to fold back the clips on the RAM slot, insert the stick and the pressure you put in that would force the clips to go to the locked position and you will hear a click. However, if you do this and the memory is not detected, the cause would be that it is not properly seated and you have to check it and if it is not perpendicular to the slot or the clips are not snapped, it was not properly inserted and you have to take it out and put it again. According to this, the answer is that the new dimm is not properly seated.