You need to find the condition that makes that triangle ARC and triangle ALT be proportional (~).
Two tringles are proportional when the ratio between the corresponding sides in each triangles are equals:
The corresponding sides are:
AL and AR
AT and AC
LT and RC
Then, one condition that makes the triangles proportional is:

The corresponding anlges in proportional trainlges are also equal, then:
Other condition that makes the triangles proportional is:



Then, all the options you have make the traingles be proportional.