Step-by-step Solution:

Correct Answer: C (124)

The pattern in this number series is based on the cubes of consecutive integers.

Step-by-step Explanation:

Each term in the series is one less than a perfect cube, starting with the cube of 0.

• $0^3 - 1 = 0 - 1 = -1$
• $1^3 - 1 = 1 - 1 = 0$
• $2^3 - 1 = 8 - 1 = 7$
• $3^3 - 1 = 27 - 1 = 26$
• $4^3 - 1 = 64 - 1 = 63$

Following this pattern, the next term should be $5^3 - 1$.

$$ 5^3 - 1 = 125 - 1 = 124 $$

To confirm, the subsequent terms would be $6^3 - 1 = 215$ and $7^3 - 1 = 342$, which match the given series.

Therefore, the missing term is 124.