In the following passage, some words have been deleted. Read the passage carefully and select the most appropriate option to fill in each blank.

Memory loss, with aging, is (1)_______ a natural and normal (2)_______. The symptoms range from forgetting simple daily life activities and (3)_______ familiar tasks such as driving or baking. However, there can be several other factors (4)_______ for it and these vary from person to person. Memory loss can be (5)______ or total depending upon the condition.

Select the most appropriate option to fill in blank number 5.