Hechos como: la revolución científica del siglo XV, la Reforma protestante o la extraorinaria invención de la Imprenta; permitieron que la época moderna se caracterizará * 5 puntos

A. por una nueva forma de pensar práctica, emprendedora y libre

B. por un mayor poder de los señores feudales y clerígos religiosos

C. por una enorme crisís de la ciencia y el pensamiento

D. por el fracaso comercial y científico de la burguesía​

During the late 19th century, russia's settlement and development of siberia was made possible by the invention of the

Africa, 1914 which statement is the best conclusion for the information presented in the map? a) european colonization had a positive impact on african nations. b) african colonization the economic growth of all european nations involved. c) by the outbreak of world war i, most of the african continent was under english control. d) by the outbreak of world war i, most of the african continent was under european control.

The authors of the paper "fudging the numbers: distributing chocolate influences student evaluations of an undergraduate course"† carried out a study to see if events unrelated to an undergraduate course could affect student evaluations. students enrolled in statistics courses taught by the same instructor participated in the study. all students attended the same lectures and one of six discussion sections that met once a week. at the end of the course, the researchers chose three of the discussion sections to be the "chocolate group." students in these three sections were offered chocolate prior to having them fill out course evaluations. students in the other three sections were not offered chocolate. the researchers concluded that "overall, students offered chocolate gave more positive evaluations than students not offered chocolate." indicate whether the study is an observational study or an experiment. give a brief explanation for your choice.