Question

in the early 1900s, what trend emerged concerning chemical weapons? chemical weapons became deadly, as did other aspects of warfare. chemical weapons disappeared and were replaced with less harmful weapons. chemical weapons became ineffective as technological advances slowed. chemical weapons remained in the form in which they were first introduced.

Explanation:

In the early 1900s, with the development of warfare technology, chemical weapons became more deadly, similar to other aspects of warfare. Chemical weapons did not disappear, become ineffective, or remain in their original form.

Answer:

Chemical weapons became deadly, as did other aspects of warfare.