7. If a teen studies for a test after using marijuana, he/she might not remember the material the next day because marijuana a. impairs short-term memory and concentration. b. irritates the lungs and causes coughing. c. distorts the sense of time, touch, and sound. d. changes testosterone levels in males. C d b a

## Step 1<br />The question is asking about the effects of marijuana on a person's memory and concentration. The options provided are:<br />a. impairs short-term memory and concentration.<br />b. irritates the lungs and causes coughing.<br />c. distorts the sense of time, touch, and sound.<br />d. changes testosterone levels in males.<br /><br />## Step 2<br />We need to identify the option that directly relates to the effects of marijuana on memory and concentration.<br /><br />## Step 3<br />Option a, "impairs short-term memory and concentration", is the correct answer because it directly relates to the effects of marijuana on memory and concentration.<br /><br />## Step 4<br />The other options, while they may be effects of marijuana, do not directly relate to the effects on memory and concentration.