What is an advantage of eastern europe's location between two continents? a. many western europeans migrate to eastern europe b. eastern europe has easy access to trade with both russia and western europe c. eastern europe has homogeneous population with one language and culture, making commerce smooth. d. eastern european nations have rarely experienced warfare or invasion leaving them free to develop economically.

the fourth amendment protects:

"the right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no warrants shall issue, but upon probable cause, supported by oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized."  

so this would mean the denial to search and seizure without warrant or permission.

answer; researchers typically cannot control people's sexual behaviors as would be necessary in an experiment;