Choose the weapon that fits each description. 1. The use of poison gasy caused more than 1.3 million casualties.

2. World War I trenches were easily defended through the use of machine gunsy

3. Though not particularly effective during World War I, tanks
made trench warfare obsolete.

what the first or next guy says

the answer is b just took the test

answer: this is because archeologists keep finding artefacts and ancient ruins dated more than 10000 to 15000 years, date around scientists said humans discovered language; which is at least mysterious as scientists always have said that is necessary to have a language to have architecture and some basic maths.

explanation: brainlest

this is a good question! i'll do some research and come back when i have the answer!