What is the early finish time for Activity O?

A) 95
B) 129
C) 113
D) 97

The early finish time for an activity in project management is determined by adding the duration of the activity to its early start time. Without specific details on the early start time of Activity O or its duration, it's impossible to accurately calculate the early finish time. However, given the options provided and without additional context or a project schedule to reference, it's not possible to provide a detailed explanation for choosing option B (129) as the correct answer. This response is based on the assumption that further details were provided in a project schedule or network diagram not visible in this interaction.