Engineering operational work to scale with a growing application is BEST achieved by addressing which...

Comprehensive and Detailed Explanation From Exact Extract:

One of the central goals of SRE is that operational work must scale sublinearly with service growth. The SRE Book states: “If operational load grows linearly with service size, the model is unsustainable. Eliminating toil is key to scaling operations.” (SRE Book – Chapter: Eliminating Toil). Toil prevents scaling because it is manual, repetitive, and tied directly to human effort.

Option C is the only answer that reflects this principle: reducing or eliminating toil enables SRE teams to support growing applications without increasing human labor proportionally.

Option A (staffing levels) does not scale sustainably.

Option B (interruptions) relate to productivity but not true scalability.

Option D (on-call rotations) affects fatigue, not the scaling of operational work.

Thus, C is the correct and SRE-authentic answer.