Premises — I) Hybrid plants are resistant to fungus. II) Fungal infection reduces the life of plants.\nQuestion — What practical conclusion follows for growers focused on plant longevity?

Introduction / Context:
The two premises link fungal resistance to hybrids and shorter life due to fungal infection. We seek a practical, actionable conclusion regarding lifespan, without adding claims about yield or universal classifications.

Given Data / Assumptions:

• Hybrids resist fungus (reduced probability or impact of infection).
• Fungal infection shortens plant life.

Concept / Approach:
If A resists B, and B causes harm C, then choosing A reduces the risk of C. Here, “hybrid” reduces fungus; fungus reduces lifespan; hence hybrids support longer lifespan relative to susceptible varieties.

Step-by-Step Solution:

Verification / Alternative check:
Even if other diseases exist, choosing hybrids at least addresses the stated fungal pathway; thus the recommendation remains sound under the premises.

Why Other Options Are Wrong:

Common Pitfalls:
Assuming resistance equals invulnerability; here we only require that resistance reduces risk sufficiently to support the conclusion.

Final Answer:
For a long life-span grow hybrid plants