Robert is four. His father tells the doctor that Robert seems very excited about his new baby sister, but he is stuttering more. Robert's father wonders if Robert's speech should be tested. What does the doctor need to know?
O whether Robert is jealous of his sister
O if it happens more when Robert is tired
O when Robert started stuttering
O if Robert also has trouble making "r" sounds

(select all the correct choose each statement that is scientific. - the opinions of randomly selected participants in a survey prove the idea that global temperatures are not increasing on earth. - the universe's average temperature and rate of expansion support the idea that it began as one super-dense and hot mass 13.8 billion years ago. - ocean tides are caused by the uneven gravitational pulls of the moon and sun on different parts of earth. - human life is more valuable than other forms of life on earth because humans are more intelligent than other organisms.