The answer is $\boxed{\text{B. }2, 18}$.
The sequence is generated by the following rule:
- Start with the numbers $6$ and $8$.
- Subtract $2$ from the first number and add $4$ to the second number.
- Repeat steps 2 and 3.
Therefore, the next pair of numbers is $2$ and $18$.
Here is a table of the first few terms of the sequence:
Number | Rule | Value
——- | ——– | ——–
$1$ | $6$, $8$ | $6 – 2 + 4 = 8$
$2$ | $8 – 2 + 4 = 10$
$3$ | $10 – 2 + 4 = 12$
$4$ | $12 – 2 + 4 = 14$
$5$ | $14 – 2 + 4 = 16$
$6$ | $16 – 2 + 4 = 18$
Option A is incorrect because $14$ and $10$ are not consecutive terms in the sequence.
Option B is correct because $2$ and $18$ are the next consecutive terms in the sequence.
Option C is incorrect because $4$ and $12$ are not consecutive terms in the sequence.
Option D is incorrect because $2$ and $14$ are not consecutive terms in the sequence.
Option E is incorrect because $14$ and $14$ are not consecutive terms in the sequence.