The correct answer is Becca.
Step-by-step explanation
Asthma is an illness that affects the respiratory system. This asthma causes inflammation in the respiratory tracts, and due to this, people with asthma experience chest pain and difficulties to breath. One of the most common medicines to decrease asthma symptoms is the inhaler because this contributes to the expansion of the respiratory tract.
According to this, it is likely Becca suffers from asthma because in the text it is explained "Tara is busy making sure that Becca has her asthma inhaler" which suggests Becca needs an inhaler and this is only possible if she has asthma as otherwise, she would not need an inhaler. So, the correct answer is Becca.