Answer
SSA
Work Step by Step
Lowercase letters represent sides of the triangle while uppercase letters represent angles of the triangle.
Since a,c and A are given, this means that two sides and one angle is given. In addition, the angle A is not the included angle as it is not between a and c.
It is clear that SSA is given since SSA refers to side-side-angle where the given angle is not the one included between the two given sides.