mr. p is laughing uncontrollably after hearing the news of his sister's death, and his laughter is punctuated by rapid and off-topic speech. what type of symptoms of schizophrenia is he struggling with?

The correct answer is disorganized type of symptoms. 

Disorganized type of schizophrenia or hebephrenia is characterized by inappropriate affect or emotional expression, and disorganized speech or behavior. Schizophrenic individuals might express emotions that are inappropriate in a particular situation (such as laughing during a funeral or getting angry when unprovoked). Additionally, they might randomly talk about topics that are unrelated to a topic of conversation or in response to questions. 

The changes to agriculture in the united states since 1900 is that increased mechanization has increased food production, thereby increasing the need for labor. there has been an increased need for higher speeds of food production due the fact that the population in the united states continues to rise.