Didi Chuxing is similar to Uber, and indeed bought Uber’s business in China nearly two years ago. The Chinese company, which has been expanding at a breakneck pace within the country and around the world, says it has 450 million users. One of China’s most successful tech giants, it is expected to explore making a multibillion-dollar initial public offering this year.

问题：

请问explore什么意思？在文中属于下列第几项解释？有explore doing sth的用法吗？

1 Examine or evaluate (an option or possibility)

2 to investigate, study, or analyze : look into