The given sequence is
[tex]3,7,11,15[/tex]As you can notice, the pattern is "sum 4 units", because
3 + 4 = 7
7 + 4 = 11
11 + 4 = 15
This pattern fits perfectly to the sequence.
If we keep adding, we get
15 + 4 = 19
19 + 4 = 23
23 + 4 = 27
27 + 4 = 31
As you can observe, no mattern how many times we add, there's always an odd numbers.
Therefore, the right answer is each term in the pattern will be odd.