Dorothy, age 65, is beginning to have trouble driving at night. this is probably because

As people get older (past the original "limits" of our pre-modern ancestors), their bodies begin to degenerate and decline in a number of ways; due to both age, environmental, and societal factors. In this case, the systems of the eye break down and connections weaken. The eye is not able to process light in the same way and this leads to night-sight errors. It is a common problem that people have as age approaches.

In the scenario given above, the most likely form of market efficiency that probably exist is STRONG FORM MARKET EFFICIENCY. There are three different types of market efficiency, these are: weak form, semi strong form and strong form. Strong form market efficiency is the strongest form of market efficiency. Market efficiency refers to the extent to which stock prices and other securities prices reflect all available relevant information.