According to a recent encyclopedia entry about dog breeds, labrador retrievers come in two specific breeds: english and american. the article cites six studies from several scientific journals about dog breeding showing that males of both breeds usually average 29-41 kg (65-90 lb) in weight, and females usually average 25-32 kg (55-70 lb) in weight. anna’s female labrador retriever weighs 38 kg (83 lb). what does anna’s dog’s weight indicate about the reliability of this source? a. this is still a reliable source because it clearly cites scientific research. b. this is still a reliable source because it is a printed book, not the internet. c. this is no longer a reliable source because anna disproved the studies. d. this is no longer a reliable source because anna’s dog’s weight is in the range for males.

The correct answer will be option D.

Explanation:

A scientific study is a well-substantiated idea and opinion which is well supported with the experiments, observations and data.

In the given question the source is not reliable as the article published on encyclopedia cites only six studies from different journals about dog breeding which does not justify the 38 kg weight category of female Labrador retriever of Anna which falls into the range of males. Scientific research should have a large sample size to have a small margin of error and find more accurate mean values.

Thus, option D is the correct answer.

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.