A. Is the answer. Other 3 things are completed much earlier.
Honest ignorance or knavish hypocricy by john adams.
Answer:
B. Cross-Sectional
Explanation:
A Cross-sectional study of design is a kind of design of observational study . In the cross-sectional study, an investigator measures or examines the outcome as well as the exposures in any study participants at the same time.
Cross-sectional design research includes using some different category of the people who differ in some variable of interest but they share few other characteristics, like educational background, socioeconomic status and ethnicity.
A Cross-sectional studies are mostly used by experimenters or researchers to study the developmental psychology in humans.
Thus in the context, the researcher using 50 participants to study the developmental changes in their choices to listen to music is a type of cross sectional research design.
Hence the correct option is (B).
<em>Answer:</em>
<em>B. optimism </em><em> </em>
<em>Explanation:</em>
<em>Optimism</em><em> is determined as an attitude that can affect an individual's physical and mental health positively. It is also responsible for increasing an individual's longevity and reducing his or her stress. However, various psychologists believed that optimism generally signifies the belief of an individual that different outcomes of experiences or events will be considered as positive.</em>
<em>As per the question, Lydia exemplifies optimism.</em>
