Replace a MacBook Air (13-inch, Late 2010) logic board

You are about to replace a MacBook Air (13-inch, Late 2010) logic board. Which of the following is the most important step you should take immediately after removing the bottom case?
A. Remove the thermal module.
B. Install the battery cover.
C. Remove the hard drive.
D. Remove the battery.
[toggle title_open=”Close Me” title_closed=”Answer” hide=”yes” border=”yes” style=”default” excerpt_length=”0″ read_more_text=”Read More” read_less_text=”Read Less” include_excerpt_html=”no”]D[/toggle]

Battery, LI-ION, 50W, w/Battery Cover