This question focuses on identifying the most indicative factor of an educational program's effectiveness in fostering international student success. Option A, while important for creating an inclusive environment, does not directly measure the success of international students. Option B suggests a metric that is more related to the students' personal choices rather than the program's effectiveness. Option C directly addresses the outcomes of the program in terms of academic achievements and career advancements, which are clear indicators of the program's effectiveness. Option D, regarding funding, is unrelated to the direct outcomes of student success. Therefore, the most accurate answer is C, as it directly measures the program's impact on international students' success.