Question

An increase in population,without an increase in economic level, ______ result in a lower standard of living

• A. tends to
• B. tending to
• C. will tend
• D. tends

Answer 1

The correct option is A tends to

There must be the preposition 'to' to connect the verb 'tend' with the noun 'result', (2) is not correct because first form of verb should be used and not continuous since its a simple statement made suggesting no action taking place at the current moment.