d
The pattern suggests the next letter is "I" as it is the vowel following the pattern of consonants "M", "V", and "E".
One Two Three Four Five Six Seven Eight
I is the next letter.
To provide necessary context, the original question was "What letter comes next in this sequence? WLCNIT_" Notice the first letter of each word in that question. The answer is S, corresponding to "sequence."
The next letter in the sequence is S. The pattern follows the alphabet sequence with each letter moving forward two positions.
a
A
D
JSUN
s
The next letter is U.