One disadvantage of using a survey to gather data for psychological purposes is the fact that it can be . A.
an inefficient data collection tool
B.
only used to gather unobservable information
C.
difficult to use for research purposes
D.
potentially unreliable or invalid

Bis the correct answer

Travel clerkdegree level: certificate or college degree preferred by employersdegree field: travel planning, travel, or tourism licensure and certification: business license may be required; voluntary certifications available construction carpenterrequired education: a high school dimploma and carpentry apprenticeship transportation managerdegree level: bachelor's degree in supply chain management or bachelor's degree in logistics degree field: supply chain management, systems engineering and business licence or certification: no legal requirement for a transportation to become certified but is recommended since certifications demonstrate commitment to excellence and a broader knowledge chief executive degree level: bachelor's degree; mba preferred degree field: liberal arts, business administration, public administration or field of specialty chosen (i.e health care administration)license or certificate: voluntary certification available

Labor costs would be a large factor holding production of shade-grown coffee back. if it requires higher labor costs to receive a smaller benefit per hectare, then these costs would be prohibitive on expanding this practice to all coffee growing.