Welche Bedeutung steckt hinter der hier vorgestellten Vokabel aus dem Bereich Administration?

'It's great that you agreed to take over responsibility for organizing our English classes.' 'Well, at first I wasn't at all happy about it, but I'm right in the thick of it now - and it's good fun!'

to be in the thick of it

Do you know what it means?

• to be very enthusiastic
• to be under intense time pressure
• to be completely involved