When executing a ${?}^{\text{'}}++$i instruction, which statement about the value of i is most correct?

i will be updated and the compiler will immediately write to each level of the memory hierarchy to update it

i will not change because the correct operator is i$++($postfix$)$ not $++$i $($prefix$)$

iwill only be updated if it is currently in a register

i will be updated in a register but the memory hierarchy will not necessarily immediately reflect that change