In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives.
Passage:

Education is the most important and ______ tool for women empowerment. It makes women aware of their rights and responsibilities. Educational achievements of a woman can have ______ effects for the family and across generations. Most of the girls drop out of schools due to the unavailability of separate toilets for them. The recently launched ‘Swachh Bharat Mission’ focusing on ______ sanitation facilities in schools and every rural household by 2019, can prove to be very ______ in bringing down the ______ of girls dropping out of school.