单选题 KG Telecoms takes every possible measure to ensure that personal information provided by its customers is kept ______ at all times.

【正确答案】 C

【答案解析】[解析] 词汇：形容词
1．这是一道词汇选择题，选项均为形容词。
2．原文意思是“妥善保管”，因此C．secure为正确选项。