Samreensa
I have two reasonings for B
Any opinion which one looks good or both?
Population can looked from 2 perspective : income earner or the grain/meat consumer, in former - if not remained constant, changed may be due to infant/senior citizen. If later, negate - may increase too and if this happens import would be need hence strengthen.
Samreensa Your instinct to examine population is good, but here's what's happening: The argument uses \(per capita\) measures throughout - "
per capita income" and "
per capita consumption." These are
rate measures (consumption/person), not total measures.
Why B Seems Tempting But Isn't EssentialYou correctly identified that if population changes, it affects total consumption. However:
- The argument could still work even if population increased (more people = more total consumption needed)
- The argument could still work even if population decreased slightly (if the per capita increase is large enough)
The argument doesn't
depend on population being constant - it just needs total grain demand to exceed domestic production.
The Real Assumption - Option EThe critical assumption is about
consumption substitution patterns. Here's the grain flow:
- Grain can be consumed directly (as bread, rice, etc.)
- Grain can be fed to animals to produce meat (several pounds of grain → \(1\) pound of meat)
The argument assumes that when people eat more meat, they don't drastically reduce their direct grain consumption. If they did:
- Person eats \(+1\) pound of meat (needs \(5\) pounds of grain to produce)
- Same person eats \(-4\) pounds of grain directly
- Net grain requirement only increases by \(1\) pound (not \(5\) pounds!)