Question

putting his foot down.
uncle sam (to the powers) - gentlemen, you may cut up this map as much as you like; but remember that ive been to a
and that you cant divide me up into spheres of influence!
how does the cartoonist convey the impact of the open door policy on chinas sovereignty?
by showing a welcoming gesture
by emphasizing economic prosperity
by depicting a harmonious exchange
by illustrating forceful intrusion

Explanation:

The cartoon shows figures (representing powers) with weapons and one putting a foot down on what seems to be a map - like representation. The imagery of force (weapons, putting a foot down) suggests an intrusive action rather than a welcoming, prosperous, or harmonious one.

Answer:

By illustrating forceful intrusion