Answer:
C. When excess capacity exists, cost can increase
Explanation:
The only False statement in all the given four statement is option C that is When excess capacity exists, cost can increase.
Clearly, the above statement is false because when by the principle of economies of scale at higher capacity, the overall cost of production decreases. ( in simple terms, higher the supply, lesser will be the demand.)
The main reason for migration is mostly food: people migrate where they can produce food easily, catch it, or in modern times, to produce money to buy food.
Other reasons is conflict with other people and competition for food: people migrate in the hope that elsewhere they won't have to compete.
Finally, people might also migrate to look for a better climate (where they don't have to built very cold resistible houses for example).
Subdue-conquer or defeat
deplete-drain or lessen energy, etc
reiterate- repeat
unscathed-unhurt or undamaged
stipulate- make an agreement
contingent-small group of people belonging to larger organization