The word to fill in the blank would be A) Investors.
The factors that made it difficult for Eastern Europe to improve its water quality were outdated sewer systems, raw water quality, worn-out water utilities and unskilled employees. So we can say that four options given in the question fits the bill perfectly. These basic infrastructural reasons were responsible for being a hurdle towards improving the water quality. <span />
Answer:O He mentions that he was friends with ex-slaves.
O He mentions what he had experienced and seen as a slave.
O He describes what he now knows as a ex-slave.
Explanation:
