Based on the following tree, answer the following question:

Target variable: antibody $($two categories$)$

Important group$=$ yes

Variables entered into the model: age, gender, country, social distancing, wave, severity, pre$-$existing condition

Are country and severity significant predictors of antibody?

Group of answer choices

both are significant

no for country, yes for severity

we don't know. we need more information

both are not significant