Can cell phone use lead to brain cancer?

which technique would represent the most cost effective approach to conduct an investigation of this research question?
a) do a literature review on previous studies done on this topic.
b) ask friends and family that use cell phone if they have brain cancer.
c) call the cell phone companies and talk to a customer service representative.
d) hire a research firm to write, distribute, collect, and analyze results of a national survey.

Which of the following scenarios is an example of attentional blink? click or tap a choice to answer the question. while grading a student’s essay, a professor does not notice the mistake in the following sentence: “metacognition is the the awareness of one’s own thought processes.” a waiter is telling two friends about the daily specials when a neighboring table erupts in laughter. the friends ask the waiter to repeat the last few items because their attention was diverted by the sudden loud laughs. you watch television while you study for a language exam. the next day, you are unable to recall the majority of the new vocabulary you thought you had memorized. you are at a loud concert, and you are able to concentrate on the music while blocking out the conversations around you, cell phone rings, and other irrelevant stimuli.

Wich characteristics make the long ballot ineffective

Why has there been an increase in the older population within our prisons?