The most conservative estimate of behavior is provided by the discontinuous data collection method known as

The correct answer is ''momentary time sampling.''  

Explanation:

We speak of momentary time sampling when in each interval only those behavioral categories that occur at the end of the interval are recorded. It is appropriate for behaviors that persist for a long period of time where the behavior occurs by the time the interval ends. To record using momentary time sampling, the observer checks the time intervals in which the behavior occurred or did not occur until the time the interval ends. The behavior is recorded only once per interval and is reported as a percentage of intervals.

answer; adoption agencies tend to place separated twins in similar homes;