Most psychoactive drugs create their changes in mood, energy, or perception by changing

By changing the body’s supply neurotransmitters. Drugs change neurotransmission by working together with molecular components of the sending and receiving method excluding receptors. For example, cocaine fastens to the dopamine transporter, the molecular conduit that draws free-floating dopamine out of the synapse and back to the sending neuron. On condition that cocaine occupies the transporter, dopamine cannot re-enter the neuron. It builds up in the synapse, stimulating receiving-neuron receptors more copiously and creating much greater dopamine impact on the receiving neurons than occurs naturally.

even though you have attached neither the chart nor the generalizations, i have located them online. the right answer is d, since they are asking you about a generalization. you can only infer from the chart that between 2008 and 2009 the number of employed workers decreased significantly (from over 115 millions to 107 millions approximately), which signals some type of economic crisis.  

answer; triadic reciprocal determinism;