During the 1950s, many middle class americans were unaware of poverty. are poor people invisible today? explain

answer; (d) i believe that the correct answer is americans finally ran out of ammunition;

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