While studying a large colony of macaque monkeys, scientists interacting with baby monkeys under a week old found that the babies would imitate some, but not all, of the scientists' actions.
Statements
Contrast Baby macaques under a week old imitated some of the scientists' actions but not others.
They imitated lip smacking and sticking out the tongue. They did not imitate opening and closing the mouth or hand gestures.
Conditional (only) Used by adult macaques with babies → lip smacking or sticking out the tongue
Evaluate
Most Supported questions are primarily focused on causality. There is no explicit causality here but there are Two Differences.
One of the "causal difference maker" patterns on Most Supported is this whole One Difference Explains Another thing.
Difference 1: the only researcher actions the baby monkeys imitated where lip smacking and tongue sticking.
Difference 2: the only researcher actions that adult macaques use are lip smacking and tongue sticking.
The overlap is the place to look. Two lists appear in the passage: the actions the babies copied, and the actions adult macaques use with babies. The lists are identical.
This is setting us up to speculate that One Difference Explains the Other. The fact that adult macaques do lip smacking and tongue-stickin' around babies is probably why the babies only imitated those two actions.
Goal
Find the most provable claim, probably one suggesting a connection between which actions are done by adult macaques, and which ones the babies imitated.