As she speaks to no one, shuts her door, and is rarely seen again is a sing of lack of trust. Hence the option B is correct.
As per the text Rosalyn comes to office and she speaks to no one and suddenly shuts her door she is rarely seen until lunch as she supervises a team of 12 people her friend Carmelita has a new idea she should like to share with the management but is not sure whether it will work.
As the office lacks mutual coordination and team work the sharing of her idea would disturb the environment and hence lead to further problems thus she refrains from discussing it hence the upwards communication is affected by the lack of trust and cordial relationship.
Hence the option B is correct.
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