In the following passages, the numbered gaps indicate missing words. Against each number in the list below each passage, four options are given in columns lettered A to D. Choose the word that is the most suitable to fill the numbered gap in the passage.

PASSAGE A:
For thousands of years, man lived in a very primitive way. Before the recent -77- in agriculture, medicine and industry, life was difficult. It was hard to -78- a living from the -79- without modern farming -80-, and a single year of crop -81- could mean famine and therefore death. Illnesses as -82- and as -83- as influenza could kill a Stone Age man weakened by hunger; appendicitis was always -84- before the days of modern -85-. Even childbirth was a hazardous process. Under these conditions, the human race needed to -86- at a high -87- just to keep in existence.

However, with a sharp fall in the -88- rate relative to the -89- the world's population is now increasing very rapidly. This increase needs to be put in -90-to avoid the looming consequence of population -91-.

PASSAGE B:
When my elder brother decided to -92- a current account with United Bank for Africa, he walked into one of its -93- and obtained the necessary -94- which he completed and returned to the -95-. He was then given paying in -96-. Soon, he started issuing -97- to people with whom he transacted business. Whenever his signature was irregular, his cheque was not -98- Once, he wanted to obtain a -99- and the bank insisted on -100-.