Data from Gapminder

Data from gapminder.org on 184 countries was used to examine if there is an association between (average) female life expectancy (that is, the average lifespan of women in the country) and the average number of children women give birth to for the year 2019. A scatterplot of the data and a regression table from the Corr/Regression applet follows.
-Which of the following validity conditions does not need to be checked in order to conduct a theory-based test for a regression slope?

A) The number of countries in the data set is larger than 20.
B) The variability in female life expectancy around the regression line should be similar regardless of the value of average number of babies per woman.
C) There is approximately the same distribution of points above the regression line as below the regression line.
D) The general pattern of the points on the scatterplot has a linear trend.