The image above show four Nutrient Agar plates each inoculat…

The image above show four Nutrient Agar plates each inoculated with a bacteriophage called COVID-20, and with bacterias A, B, C, and D respectively. After 24 hours of incubation contrast light was used to better observe the plaques as clear white dots. According to the results, what is the host range of the unknown bacteriophage?