Choose one right answer. 1. The contacts of our scientists with their colleges in other countries... a) are b) are growing c) are steadily growing

To choose one right answer, we would need a bit more context about the sentence in which this phrase appears. However, assuming it's a complete sentence and based on the options provided, the phrase that makes the most sense grammatically and contextually would be:

c) are steadily growing

So the complete sentence would be: "The contacts of our scientists with their colleges in other countries are steadily growing." This implies that there is a continuous and consistent increase in the connections between scientists and their international colleagues.