The answer is a. President.
The word President is the predicate nominative here, also known as predicate noun.
A predicate noun is a word which renames the noun that has been mentioned in the sentence. In this case Franklin Roosevelt is the noun that has been renamed as "President", which makes it the answer to the question.
Another example in : My brother's favourite food is pizza.
The predicate nominative in the sentence is Pizza. because that is the word that is replacing the earlier mentioned noun, which was "food".
<span>To support the author's own ideas. APEX :)
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Monasteries were important economic centers. Because the monks were expected to work, many monasteries became known for their skills at various trades, particularly the production of alcohol. They would also grow their own food, either for their own consumption or to sell in order to buy things they couldn't produce for themselves. In many cases monasteries had to clear land for their farms - the ideal was to build in the wilderness - which tended to attract settlers and could result in a town growing up around the monastery. Also, people would often donate land to their favorite monastery and many of these land grants could be quite profitable in their own right. It also meant that the monasteries wound up entangled in secular politics, just like any other major medieval landowner.
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